Abstract
This study focuses on cases of recurrent myocardial infarction, and the time between a previous occurrence and recurrence as a means to elucidate factors related to the length of this interval and thereby help prevent recurrence. The subjects were 78 patients hospitalized at Showa University Hospital, who met the criteria of male with records of the time from a previous myocardial infarction until a recurrence. The average interval from a prior myocardial infarction until a recurrence was 67.0 months. Items surveyed included : sex, date of birth, date of previous myocardial infarction, date of recurrence, employed/unemployed, total serum cholesterol level, serum neutral lipid level, obesity level, presence or absence of hypertension, presence or absence of diabetes, smoker/nonsmoker, presence or absence of hyperuricemia, and family history if any. CATDAP-02 was used to analyze possible relations between the occurrence-recurrence interval and the items surveyed. The results indicated statistical significance of relations of total serum cholesterol and obesity levels with the time from the occurrence of a myocardial infarction to recurrence. A +10 % to +15 % obesity level was considered related, with + 13 % especially related, but the conventional +20 % standard was only weakly related to the time between occurrence and recurrence. A total serum cholesterol level of 180mg/dl to 200mg/dl was related, and this relation was stronger at 180mg/dl, in particular. No relation was evident at 220mg/dl, which has been conventionally used as a criterion. The findings suggest the need to maintain lower than the usually indicated levels of obesity and total serum cholesterol after myocardial infarction.
